Which statement accurately classifies helium?

A. it is an atom

B. It is a mixture

C. It is a molecule

D. It is a compound

Thermoelectric power plants are used to generate electricity. Which of these statements best describes the impact of a thermoelectric power plant on the environment? It causes droughts. It uses a lot of water. It stops the growth of trees.

When you step on the accelerator to increase the speed of your car, the force that accelerates the car is: A. the force of your foot on the accelerator B. the force of friction of the road on the tires C. the force of the engine on the drive shaft D.

A draft is made of a plastic block with a density of 650kg/m^3, and its dimensions are 2.0mx3.0mx5.0m, what is the raft's apparent weight in water? (hint:density of water=1.00x10^3kg/m^3

What is an electric motor? Explain its operation.

According to Newton's first law of motion, which force is expected to cause a body to accelerate? A. unbalanced force B. balanced force C. weak force D. strong force

ne mole of an ideal gas is expanded from a volume of 1.00 liter to a volume of 8.41 liters against a constant external pressure of 1.00 atm. How much work (in joules) is performed on the surroundings? Ignore significant figures for this problem.

Is physical science part of physics?

Which statement is true about the atomic mass?

Velocity is: а - speed and direction. b - distance divided by time. c - always the same as speed. distance multiplied by time. d - distance multiplied by time

The gauge pressure in each of the four tires of an automobile is 230 kpa. if each tire has a "footprint" of 180 cm2 (area touching the ground), determine the mass of the car.